diff options
| author | Stephen Warren <swarren@wwwdotorg.org> | 2015-03-08 11:08:14 -0600 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2015-04-14 05:47:59 +0200 |
| commit | 805b67e1ea9a733f8fd526989b154648aca8afb6 (patch) | |
| tree | db31dcc026995bcbb3da468eccd617ba8319ac4d /drivers/usb | |
| parent | d1c880c66c2f4d676afd91ce041a3e66c2ab3fa4 (diff) | |
usb: dwc2: remove restriction on buffer length
Each USB transfer is split up into chunks that are held in an aligned
buffer. This imposes a limit on the size of each chunk, but no limit on
the total size of transferred data. Fix the logic in chunk_msg() not to
reject large transfers, but simply take the size of the aligned buffer
into account when calculating the chunk size.
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/dwc2.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index 05d21b7948..e370d29ffc 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -756,24 +756,18 @@ int chunk_msg(struct usb_device *dev, unsigned long pipe, int *pid, int in, debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid, in, len); - if (len > DWC2_DATA_BUF_SIZE) { - printf("%s: %d is more then available buffer size (%d)\n", - __func__, len, DWC2_DATA_BUF_SIZE); - dev->status = 0; - dev->act_len = 0; - return -EINVAL; - } - do { /* Initialize channel */ dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, devnum, ep, in, eptype, max); xfer_len = len - done; - /* Make sure that xfer_len is a multiple of max packet size. */ if (xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE) xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE - max + 1; + if (xfer_len > DWC2_DATA_BUF_SIZE) + xfer_len = DWC2_DATA_BUF_SIZE - max + 1; + /* Make sure that xfer_len is a multiple of max packet size. */ if (xfer_len > 0) { num_packets = (xfer_len + max - 1) / max; if (num_packets > CONFIG_DWC2_MAX_PACKET_COUNT) { |